Happy Mittal
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 Sep24 awarded Autobiographer Aug29 awarded Notable Question Jul16 awarded Yearling Jul2 awarded Curious Jun25 comment number of ways to stack n distinct objects into k distinct boxes Ok, so from stars and bars, we can place k-1 dividers in $^{n+k-1}C_{n-1}$ ways, and then multiply it by n! ? Jun25 asked number of ways to stack n distinct objects into k distinct boxes May21 accepted Why does $\sin(0)$ exist? May14 awarded Popular Question May14 awarded Nice Question May14 comment Why does $\sin(0)$ exist? I understand sine definition from unit circle, but that "y coordinate" definition itself comes from triangle formed, right ? If not, then how y-coordinate was chosen for definition for sine ? May14 comment Why does $\sin(0)$ exist? @GrahamKemp : But doesn't that definition of $\sin(\alpha)$ come from the triangle formed there in the circle? May14 comment Why does $\sin(0)$ exist? @DaenerysNaharis But in unit circle also, isn't sine defined in terms of triangle only i.e. because hypotenuse is 1 there, then only we can say that sin(x) is length of perpendicular ? May14 comment Why does $\sin(0)$ exist? @Callus : My bad, I have edited that. May14 revised Why does $\sin(0)$ exist? deleted 9 characters in body May14 asked Why does $\sin(0)$ exist? Apr10 awarded Famous Question Apr3 revised To find coordinates of a point inside triangle added 1 characters in body Mar30 comment Condition for infinitely many solutions Thanks for the answer, but I am a beginner in linear algebra, and learning it by watching Gilbert strang's lectures, and I am not up to the point of understanding kernels etc. I wanted a just visual clue about infinitely many solutions, because I have that clue in system in 2 variables. Mar30 asked Condition for infinitely many solutions Mar11 awarded Popular Question